GetAttributeValue | Get the value of a subtype attribute by the entity attribute's id. | 
  GetAttributeValueByName | Get the value of an subtype attribute by its name. | 
  GetEntitySubtype | Get an instance of IEntitySubtype wrapping this customization type. | 
  GetField | Gets the CustomizationTypedField specified by FieldName. | 
  Fields | The list of CustomizationTypedField objects for this type. | 
  ID | The CustomizationSubtype ID. | 
  Name | The CustomizationSubtype name. |